﻿//Copyright 2008 Kristian Gundry And Rune Juhl-Petersen
//This file is part of Plain.

//Plain is free software: you can redistribute it and/or modify
//it under the terms of the GNU Lesser General Public License as published by
//the Free Software Foundation, either version 3 of the License, or
//any later version.

//Plain is distributed in the hope that it will be useful,
//but WITHOUT ANY WARRANTY; without even the implied warranty of
//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//GNU Lesser General Public License for more details.

//You should have received a copy of the GNU Lesser General Public License
//along with Plain.  If not, see <http://www.gnu.org/licenses/>.
using System;
using System.Collections.Generic;
using System.Text;
using System.Reflection;

namespace Plain.Mapping
{
    public class PropertyUtil{
        /// <summary>
        /// Gets the value of a named multilevel property. ex. "Category.Name" gets the Name property of the Category property
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="o"></param>
        /// <param name="propertyName"></param>
        /// <returns></returns>
        public static T GetValue<T>(object o, string propertyName){
            return GetValue<T>(o,o.GetType(),propertyName);
        }
        /// <summary>
        /// Gets the value of a named multilevel property. ex. "Category.Name" gets the Name property of the Category property
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="o"></param>
        /// <param name="t"></param>
        /// <param name="propertyName"></param>
        /// <returns></returns>
        public static T GetValue<T>(object o,Type t, string propertyName) {
            object f = o;
            
            foreach (string propertyname in propertyName.Split('.')) {
                try {
                    PropertyInfo prop = t.GetProperty(propertyname);
                    f = prop.GetValue(f, null);
                    t = prop.PropertyType;
                } catch { return default(T); }

            }
            try {
                return (T)f;
            } catch {
                return default(T);
            }
        }

    }
}